There's an old saying that goes, "Everything is funnier when people have mannequin arms," and it couldn't be more true. In the latest installment of "Real People, Fake Arms," Jimmy Fallon and Seth Rogen reminisce about their time as co-stars on "Jacob's Patience" and then give us a taste of the magic that once was.

Watch part one above and part two below. And for more fake arm silliness, check out this episode from March where Fallon was joined by Justin Timberlake and Steve Carell.